SMSWatcher: Use the ModemManager1 dbus interfaces

chrome/browser/chromeos/cros/sms_watcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/cros/sms_watcher.h"
 
+#include <algorithm>
+#include <deque>
+#include <string>
+#include <vector>
+
 #include "base/bind.h"
 #include "base/values.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/flimflam_device_client.h"
 #include "chromeos/dbus/gsm_sms_client.h"
+#include "chromeos/dbus/modem_messaging_client.h"
+#include "chromeos/dbus/sms_client.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
 namespace {
 
 int decode_bcd(const char *s) {
   return (s[0] - '0') * 10 + s[1] - '0';
 }
 
+void decode_timestamp(const std::string& sms_timestamp, SMS *sms) {
+  base::Time::Exploded exp;
+  exp.year = decode_bcd(&sms_timestamp[0]);
+  if (exp.year > 95)
+    exp.year += 1900;
+  else
+    exp.year += 2000;
+  exp.month = decode_bcd(&sms_timestamp[2]);
+  exp.day_of_month = decode_bcd(&sms_timestamp[4]);
+  exp.hour = decode_bcd(&sms_timestamp[6]);
+  exp.minute = decode_bcd(&sms_timestamp[8]);
+  exp.second = decode_bcd(&sms_timestamp[10]);
+  exp.millisecond = 0;
+  sms->timestamp = base::Time::FromUTCExploded(exp);
+  int hours = decode_bcd(&sms_timestamp[13]);
+  if (sms_timestamp[12] == '-')
+    hours = -hours;
+  sms->timestamp -= base::TimeDelta::FromHours(hours);
+}
+
 // Callback for Delete() method.  This method does nothing.
 void DeleteSMSCallback() {}
 
 }  // namespace
 
 const char SMSWatcher::kNumberKey[] = "number";
 const char SMSWatcher::kTextKey[] = "text";
 const char SMSWatcher::kTimestampKey[] = "timestamp";
 const char SMSWatcher::kSmscKey[] = "smsc";
 const char SMSWatcher::kValidityKey[] = "validity";
 const char SMSWatcher::kClassKey[] = "class";
 const char SMSWatcher::kIndexKey[] = "index";
 
+const char SMSWatcher::kModemManager1NumberKey[] = "Number";
+const char SMSWatcher::kModemManager1TextKey[] = "Text";
+const char SMSWatcher::kModemManager1TimestampKey[] = "Timestamp";
+const char SMSWatcher::kModemManager1SmscKey[] = "Smsc";
+const char SMSWatcher::kModemManager1ValidityKey[] = "Validity";
+const char SMSWatcher::kModemManager1ClassKey[] = "Class";
+const char SMSWatcher::kModemManager1IndexKey[] = "Index";
+
+class SMSWatcher::WatcherBase {
+ public:
+  WatcherBase(const std::string& device_path,
+              MonitorSMSCallback callback,
+              void* object,
+              const std::string& dbus_connection,
+              const dbus::ObjectPath& object_path) :
+      device_path_(device_path),
+      callback_(callback),
+      object_(object),
+      dbus_connection_(dbus_connection),
+      object_path_(object_path) {}
+
+  virtual ~WatcherBase() {}
+
+ protected:
+  const std::string device_path_;
+  MonitorSMSCallback callback_;
+  void* object_;
+  const std::string dbus_connection_;
+  const dbus::ObjectPath object_path_;
+
+  DISALLOW_COPY_AND_ASSIGN(WatcherBase);
+};
+
+namespace {
+
+class GsmWatcher : public SMSWatcher::WatcherBase {
+ public:
+  GsmWatcher(const std::string& device_path,
+             MonitorSMSCallback callback,
+             void* object,
+             const std::string& dbus_connection,
+             const dbus::ObjectPath& object_path)
+      : WatcherBase(device_path, callback, object, dbus_connection,
+                    object_path),
+        weak_ptr_factory_(this) {
+    DBusThreadManager::Get()->GetGsmSMSClient()->SetSmsReceivedHandler(
+        dbus_connection_,
+        object_path_,
+        base::Bind(&GsmWatcher::OnSmsReceived, weak_ptr_factory_.GetWeakPtr()));
+
+    DBusThreadManager::Get()->GetGsmSMSClient()->List(
+        dbus_connection_, object_path_,
+        base::Bind(&GsmWatcher::ListSMSCallback,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  virtual ~GsmWatcher() {
+    DBusThreadManager::Get()->GetGsmSMSClient()->ResetSmsReceivedHandler(
+        dbus_connection_, object_path_);
+  }
+
+ private:
+  // Callback for SmsReceived signal from ModemManager.Modem.Gsm.SMS
+  void OnSmsReceived(uint32 index, bool complete) {
+    // Only handle complete messages.
+    if (!complete)
+      return;
+    DBusThreadManager::Get()->GetGsmSMSClient()->Get(
+        dbus_connection_, object_path_, index,
+        base::Bind(&GsmWatcher::GetSMSCallback,
+                   weak_ptr_factory_.GetWeakPtr(),
+                   index));
+  }
+
+  // Runs |callback_| with a SMS.
+  void RunCallbackWithSMS(const base::DictionaryValue& sms_dictionary) {
+    SMS sms;
+
+    std::string number;
+    if (!sms_dictionary.GetStringWithoutPathExpansion(SMSWatcher::kNumberKey,
+                                                      &number)) {
+      LOG(WARNING) << "SMS did not contain a number";
+    }
+    sms.number = number.c_str();
+
+    std::string text;
+    if (!sms_dictionary.GetStringWithoutPathExpansion(SMSWatcher::kTextKey,
+                                                      &text)) {
+      LOG(WARNING) << "SMS did not contain message text";
+    }
+    sms.text = text.c_str();
+
+    std::string sms_timestamp;
+    if (sms_dictionary.GetStringWithoutPathExpansion(SMSWatcher::kTimestampKey,
+                                                     &sms_timestamp)) {
+      decode_timestamp(sms_timestamp, &sms);
+    } else {
+      LOG(WARNING) << "SMS did not contain a timestamp";
+      sms.timestamp = base::Time();
+    }
+
+    std::string smsc;
+    if (!sms_dictionary.GetStringWithoutPathExpansion(SMSWatcher::kSmscKey,
+                                                      &smsc)) {
+      sms.smsc = NULL;
+    } else {
+      sms.smsc = smsc.c_str();
+    }
+
+    double validity = 0;
+    if (!sms_dictionary.GetDoubleWithoutPathExpansion(SMSWatcher::kValidityKey,
+                                                      &validity)) {
+      validity = -1;
+    }
+    sms.validity = validity;
+
+    double msgclass = 0;
+    if (!sms_dictionary.GetDoubleWithoutPathExpansion(SMSWatcher::kClassKey,
+                                                      &msgclass)) {
+      msgclass = -1;
+    }
+    sms.msgclass = msgclass;
+
+    callback_(object_, device_path_.c_str(), &sms);
+  }
+
+  // Callback for Get() method from ModemManager.Modem.Gsm.SMS
+  void GetSMSCallback(uint32 index,
+                      const base::DictionaryValue& sms_dictionary) {
+    RunCallbackWithSMS(sms_dictionary);
+
+    DBusThreadManager::Get()->GetGsmSMSClient()->Delete(
+        dbus_connection_, object_path_, index, base::Bind(&DeleteSMSCallback));
+  }
+
+  // Callback for List() method.
+  void ListSMSCallback(const base::ListValue& result) {
+    // List() is called only once; no one touches delete_queue_ before List().
+    CHECK(delete_queue_.empty());
+    for (size_t i = 0; i != result.GetSize(); ++i) {
+      base::DictionaryValue* sms_dictionary = NULL;
+      if (!result.GetDictionary(i, &sms_dictionary)) {
+        LOG(ERROR) << "result[" << i << "] is not a dictionary.";
+        continue;
+      }
+      RunCallbackWithSMS(*sms_dictionary);
+      double index = 0;
+      if (sms_dictionary->GetDoubleWithoutPathExpansion(SMSWatcher::kIndexKey,
+                                                        &index)) {
+        delete_queue_.push_back(index);
+      }
+    }
+    DeleteSMSInChain();
+  }
+
+  // Deletes SMSs in the queue.
+  void DeleteSMSInChain() {
+    if (!delete_queue_.empty()) {
+      DBusThreadManager::Get()->GetGsmSMSClient()->Delete(
+          dbus_connection_, object_path_, delete_queue_.back(),
+          base::Bind(&GsmWatcher::DeleteSMSInChain,
+                     weak_ptr_factory_.GetWeakPtr()));
+      delete_queue_.pop_back();
+    }
+  }
+
+  base::WeakPtrFactory<GsmWatcher> weak_ptr_factory_;
+  std::vector<uint32> delete_queue_;
+
+  DISALLOW_COPY_AND_ASSIGN(GsmWatcher);
+};
+
+class ModemManager1Watcher : public SMSWatcher::WatcherBase {
+ public:
+  ModemManager1Watcher(const std::string& device_path,
+                       MonitorSMSCallback callback,
+                       void *object,
+                       const std::string& dbus_connection,
+                       const dbus::ObjectPath& object_path)
+      : WatcherBase(device_path, callback, object, dbus_connection,
+                    object_path),
+        weak_ptr_factory_(this),
+        deleting_messages_(false),
+        retrieving_messages_(false) {
+    DBusThreadManager::Get()->GetModemMessagingClient()->SetSmsReceivedHandler(
+        dbus_connection_,
+        object_path_,
+        base::Bind(&ModemManager1Watcher::OnSmsReceived,
+                   weak_ptr_factory_.GetWeakPtr()));
+
+    DBusThreadManager::Get()->GetModemMessagingClient()->List(
+        dbus_connection_, object_path_,
+        base::Bind(&ModemManager1Watcher::ListSMSCallback,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  virtual ~ModemManager1Watcher() {
+    DBusThreadManager::Get()->GetModemMessagingClient()
+        ->ResetSmsReceivedHandler(dbus_connection_, object_path_);
+  }
+
+ private:
+  void ListSMSCallback(
+      const std::vector<dbus::ObjectPath>& paths) {
+    // This receives all messages, so clear any pending gets and deletes.
+    retrieval_queue_.clear();
+    delete_queue_.clear();
+
+    retrieval_queue_.resize(paths.size());
+    std::copy(paths.begin(), paths.end(), retrieval_queue_.begin());
+    if (!retrieving_messages_)
+      GetMessages();
+  }
+
+  // Messages must be deleted one at a time, since we can not
+  // guarantee the order the deletion will be executed in. Delete
+  // messages from the back of the list so that the indices are
+  // valid.
+  void DeleteMessages() {
+    if (delete_queue_.empty()) {
+      deleting_messages_ = false;
+      return;
+    }
+    deleting_messages_ = true;
+    dbus::ObjectPath sms_path = delete_queue_.back();
+    delete_queue_.pop_back();
+    DBusThreadManager::Get()->GetModemMessagingClient()->Delete(
+        dbus_connection_, object_path_, sms_path,
+        base::Bind(&ModemManager1Watcher::DeleteMessages,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  // Messages must be fetched one at a time, so that we do not queue too
+  // many requests to a single threaded server.
+  void GetMessages() {
+    if (retrieval_queue_.empty()) {
+      retrieving_messages_ = false;
+      if (!deleting_messages_)
+        DeleteMessages();
+      return;
+    }
+    retrieving_messages_ = true;
+    dbus::ObjectPath sms_path = retrieval_queue_.front();
+    retrieval_queue_.pop_front();
+    DBusThreadManager::Get()->GetSMSClient()->GetAll(
+        dbus_connection_, sms_path,
+        base::Bind(&ModemManager1Watcher::GetCallback,
+                   weak_ptr_factory_.GetWeakPtr()));
+    delete_queue_.push_back(sms_path);
+  }
+
+  // Handles arrival of a new SMS message.
+  void OnSmsReceived(const dbus::ObjectPath& sms_path, bool complete) {
+    // Only handle complete messages.
+    if (!complete)
+      return;
+    retrieval_queue_.push_back(sms_path);
+    if (!retrieving_messages_)
+      GetMessages();
+  }
+
+  // Runs |callback_| with a SMS.
+  void RunCallbackWithSMS(const base::DictionaryValue& sms_dictionary) {
+    SMS sms;
+
+    std::string number;
+    if (!sms_dictionary.GetStringWithoutPathExpansion(
+            SMSWatcher::kModemManager1NumberKey, &number)) {
+      LOG(WARNING) << "SMS did not contain a number";
+    }
+    sms.number = number.c_str();
+
+    std::string text;
+    if (!sms_dictionary.GetStringWithoutPathExpansion(
+            SMSWatcher::kModemManager1TextKey, &text)) {
+      LOG(WARNING) << "SMS did not contain message text";
+    }
+    sms.text = text.c_str();
+
+    std::string sms_timestamp;
+    if (sms_dictionary.GetStringWithoutPathExpansion(
+            SMSWatcher::kModemManager1TimestampKey, &sms_timestamp)) {
+      decode_timestamp(sms_timestamp, &sms);
+    } else {
+      LOG(WARNING) << "SMS did not contain a timestamp";
+      sms.timestamp = base::Time();
+    }
+
+    std::string smsc;
+    if (!sms_dictionary.GetStringWithoutPathExpansion(
+            SMSWatcher::kModemManager1SmscKey, &smsc)) {
+      sms.smsc = NULL;
+    } else {
+      sms.smsc = smsc.c_str();
+    }
+
+    double validity = 0;
+    if (!sms_dictionary.GetDoubleWithoutPathExpansion(
+            SMSWatcher::kModemManager1ValidityKey, &validity)) {
+      validity = -1;
+    }
+    sms.validity = validity;
+
+    double msgclass = 0;
+    if (!sms_dictionary.GetDoubleWithoutPathExpansion(
+            SMSWatcher::kModemManager1ClassKey, &msgclass)) {
+      msgclass = -1;
+    }
+    sms.msgclass = msgclass;
+
+    callback_(object_, device_path_.c_str(), &sms);
+  }
+
+  void GetCallback(const base::DictionaryValue& dictionary) {
+    RunCallbackWithSMS(dictionary);
+    GetMessages();
+  }
+
+  base::WeakPtrFactory<ModemManager1Watcher> weak_ptr_factory_;
+  bool deleting_messages_;
+  bool retrieving_messages_;
+  std::vector<dbus::ObjectPath> delete_queue_;
+  std::deque<dbus::ObjectPath> retrieval_queue_;
+
+  DISALLOW_COPY_AND_ASSIGN(ModemManager1Watcher);
+};
+
+}  // namespace
+
 SMSWatcher::SMSWatcher(const std::string& modem_device_path,
                        MonitorSMSCallback callback,
                        void* object)
     : weak_ptr_factory_(this),
       device_path_(modem_device_path),
       callback_(callback),
       object_(object) {
   DBusThreadManager::Get()->GetFlimflamDeviceClient()->GetProperties(
       dbus::ObjectPath(modem_device_path),
       base::Bind(&SMSWatcher::DevicePropertiesCallback,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 SMSWatcher::~SMSWatcher() {
-  if (!dbus_connection_.empty() && !object_path_.value().empty()) {
-    DBusThreadManager::Get()->GetGsmSMSClient()->ResetSmsReceivedHandler(
-        dbus_connection_, object_path_);
-  }
 }
 
 void SMSWatcher::DevicePropertiesCallback(
     DBusMethodCallStatus call_status,
     const base::DictionaryValue& properties) {
   if (call_status != DBUS_METHOD_CALL_SUCCESS)
     return;
 
+  std::string dbus_connection;
   if (!properties.GetStringWithoutPathExpansion(
-          flimflam::kDBusConnectionProperty, &dbus_connection_)) {
+          flimflam::kDBusConnectionProperty, &dbus_connection)) {
     LOG(WARNING) << "Modem device properties do not include DBus connection.";
     return;
   }
 
   std::string object_path_string;
   if (!properties.GetStringWithoutPathExpansion(
           flimflam::kDBusObjectProperty, &object_path_string)) {
     LOG(WARNING) << "Modem device properties do not include DBus object.";
     return;
   }
-  object_path_ = dbus::ObjectPath(object_path_string);
 
-  DBusThreadManager::Get()->GetGsmSMSClient()->SetSmsReceivedHandler(
-      dbus_connection_,
-      object_path_,
-      base::Bind(&SMSWatcher::OnSmsReceived, weak_ptr_factory_.GetWeakPtr()));
-
-  DBusThreadManager::Get()->GetGsmSMSClient()->List(
-      dbus_connection_, object_path_,
-      base::Bind(&SMSWatcher::ListSMSCallback,
-                 weak_ptr_factory_.GetWeakPtr()));
-}
-
-void SMSWatcher::OnSmsReceived(uint32 index, bool complete) {
-  // Only handle complete messages.
-  if (!complete)
-    return;
-  DBusThreadManager::Get()->GetGsmSMSClient()->Get(
-      dbus_connection_, object_path_, index,
-      base::Bind(&SMSWatcher::GetSMSCallback,
-                 weak_ptr_factory_.GetWeakPtr(),
-                 index));
-}
-
-void SMSWatcher::RunCallbackWithSMS(
-    const base::DictionaryValue& sms_dictionary) {
-  SMS sms;
-
-  std::string number;
-  if (!sms_dictionary.GetStringWithoutPathExpansion(kNumberKey, &number))
-    LOG(WARNING) << "SMS did not contain a number";
-  sms.number = number.c_str();
-
-  std::string text;
-  if (!sms_dictionary.GetStringWithoutPathExpansion(kTextKey, &text)) {
-    LOG(WARNING) << "SMS did not contain message text";
-  }
-  sms.text = text.c_str();
-
-  std::string sms_timestamp;
-  if (sms_dictionary.GetStringWithoutPathExpansion(kTimestampKey,
-                                                   &sms_timestamp)) {
-    base::Time::Exploded exp;
-    exp.year = decode_bcd(&sms_timestamp[0]);
-    if (exp.year > 95)
-      exp.year += 1900;
-    else
-      exp.year += 2000;
-    exp.month = decode_bcd(&sms_timestamp[2]);
-    exp.day_of_month = decode_bcd(&sms_timestamp[4]);
-    exp.hour = decode_bcd(&sms_timestamp[6]);
-    exp.minute = decode_bcd(&sms_timestamp[8]);
-    exp.second = decode_bcd(&sms_timestamp[10]);
-    exp.millisecond = 0;
-    sms.timestamp = base::Time::FromUTCExploded(exp);
-    int hours = decode_bcd(&sms_timestamp[13]);
-    if (sms_timestamp[12] == '-')
-      hours = -hours;
-    sms.timestamp -= base::TimeDelta::FromHours(hours);
+  if (object_path_string.compare(
+          0, sizeof(modemmanager::kModemManager1ServicePath) - 1,
+          modemmanager::kModemManager1ServicePath) == 0) {
+    watcher_.reset(
+        new ModemManager1Watcher(device_path_,
+                                 callback_, object_, dbus_connection,
+                                 dbus::ObjectPath(object_path_string)));
   } else {
-    LOG(WARNING) << "SMS did not contain a timestamp";
-    sms.timestamp = base::Time();
-  }
-
-  std::string smsc;
-  if (!sms_dictionary.GetStringWithoutPathExpansion(kSmscKey, &smsc))
-    sms.smsc = NULL;
-  else
-    sms.smsc = smsc.c_str();
-
-  double validity = 0;
-  if (!sms_dictionary.GetDoubleWithoutPathExpansion(kValidityKey, &validity))
-    validity = -1;
-  sms.validity = validity;
-
-  double msgclass = 0;
-  if (!sms_dictionary.GetDoubleWithoutPathExpansion(kClassKey, &msgclass))
-    msgclass = -1;
-  sms.msgclass = msgclass;
-
-  callback_(object_, device_path_.c_str(), &sms);
-}
-
-void SMSWatcher::GetSMSCallback(uint32 index,
-                                const base::DictionaryValue& sms_dictionary) {
-  RunCallbackWithSMS(sms_dictionary);
-
-  DBusThreadManager::Get()->GetGsmSMSClient()->Delete(
-      dbus_connection_, object_path_, index, base::Bind(&DeleteSMSCallback));
-}
-
-void SMSWatcher::ListSMSCallback(const base::ListValue& result) {
-  // List() is called only once and no one touches delete_queue_ before List().
-  CHECK(delete_queue_.empty());
-  for (size_t i = 0; i != result.GetSize(); ++i) {
-    base::DictionaryValue* sms_dictionary = NULL;
-    if (!result.GetDictionary(i, &sms_dictionary)) {
-      LOG(ERROR) << "result[" << i << "] is not a dictionary.";
-      continue;
-    }
-    RunCallbackWithSMS(*sms_dictionary);
-    double index = 0;
-    if (sms_dictionary->GetDoubleWithoutPathExpansion(kIndexKey, &index))
-      delete_queue_.push_back(index);
-  }
-  DeleteSMSInChain();
-}
-
-void SMSWatcher::DeleteSMSInChain() {
-  if (!delete_queue_.empty()) {
-    DBusThreadManager::Get()->GetGsmSMSClient()->Delete(
-        dbus_connection_, object_path_, delete_queue_.back(),
-        base::Bind(&SMSWatcher::DeleteSMSInChain,
-                   weak_ptr_factory_.GetWeakPtr()));
-    delete_queue_.pop_back();
+    watcher_.reset(
+        new GsmWatcher(device_path_,
+                       callback_, object_, dbus_connection,
+                       dbus::ObjectPath(object_path_string)));
   }
 }
 
 }  // namespace chromeos